VBox installer for Win7 64 bit hangs after install

Description

I have upgraded to 3.2.8-64453 successfully, but I found that after the completed install, that the installer process was still running and using up 25% of CPU (ie 1 core). It took me a while to work out why my machine was so noisy!

After forcing it closed everything returned to normal. Virtualbox would run OK wvwn with the installed process stuck this way, so I guess it must have been complete.